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/*
Unix SMB/CIFS implementation.
Password and authentication handling
Copyright (C) Andrew Bartlett 2001-2002
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
extern struct auth_context *negprot_global_auth_context;
extern bool global_encrypted_passwords_negotiated;
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/****************************************************************************
COMPATIBILITY INTERFACES:
***************************************************************************/
/****************************************************************************
check if a username/password is OK assuming the password is a 24 byte
SMB hash
return True if the password is correct, False otherwise
****************************************************************************/
NTSTATUS check_plaintext_password(const char *smb_name, DATA_BLOB plaintext_password, auth_serversupplied_info **server_info)
{
struct auth_context *plaintext_auth_context = NULL;
auth_usersupplied_info *user_info = NULL;
uint8_t chal[8];
NTSTATUS nt_status;
if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&plaintext_auth_context))) {
return nt_status;
}
plaintext_auth_context->get_ntlm_challenge(plaintext_auth_context,
chal);
if (!make_user_info_for_reply(&user_info,
smb_name, lp_workgroup(), chal,
plaintext_password)) {
return NT_STATUS_NO_MEMORY;
}
nt_status = plaintext_auth_context->check_ntlm_password(plaintext_auth_context,
user_info, server_info);
(plaintext_auth_context->free)(&plaintext_auth_context);
free_user_info(&user_info);
return nt_status;
}
static NTSTATUS pass_check_smb(const char *smb_name,
const char *domain,
DATA_BLOB lm_pwd,
DATA_BLOB nt_pwd,
DATA_BLOB plaintext_password,
bool encrypted)
{
NTSTATUS nt_status;
auth_serversupplied_info *server_info = NULL;
if (encrypted) {
auth_usersupplied_info *user_info = NULL;
make_user_info_for_reply_enc(&user_info, smb_name,
domain,
lm_pwd,
nt_pwd);
nt_status = negprot_global_auth_context->check_ntlm_password(negprot_global_auth_context,
user_info, &server_info);
free_user_info(&user_info);
} else {
nt_status = check_plaintext_password(smb_name, plaintext_password, &server_info);
}
TALLOC_FREE(server_info);
return nt_status;
}
/****************************************************************************
check if a username/password pair is ok via the auth subsystem.
return True if the password is correct, False otherwise
****************************************************************************/
bool password_ok(const char *smb_name, DATA_BLOB password_blob)
{
DATA_BLOB null_password = data_blob_null;
bool encrypted = (global_encrypted_passwords_negotiated && (password_blob.length == 24 || password_blob.length > 46));
if (encrypted) {
/*
* The password could be either NTLM or plain LM. Try NTLM first,
* but fall-through as required.
* Vista sends NTLMv2 here - we need to try the client given workgroup.
*/
if (get_session_workgroup()) {
if (NT_STATUS_IS_OK(pass_check_smb(smb_name, get_session_workgroup(), null_password, password_blob, null_password, encrypted))) {
return True;
}
if (NT_STATUS_IS_OK(pass_check_smb(smb_name, get_session_workgroup(), password_blob, null_password, null_password, encrypted))) {
return True;
}
}
if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), null_password, password_blob, null_password, encrypted))) {
return True;
}
if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), password_blob, null_password, null_password, encrypted))) {
return True;
}
} else {
if (NT_STATUS_IS_OK(pass_check_smb(smb_name, lp_workgroup(), null_password, null_password, password_blob, encrypted))) {
return True;
}
}
return False;
}
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